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Iron deficiency anemia  causing blue skin under the eyes. If there is a shortage of iron in the body, oxygen cannot be properly transported by the blood. Hemoglobin is the oxygen transporting component in the blood, moving oxygen from the lungs to the cells where it is released for normal cell metabolism.
Albinism is a condition caused by insufficient production of melanin, the pigment that gives color to your skin and hair. This melanin deficiency also affects the eyes, which can appear red or pink as a result. Since albinos lack pigment, their eyes arenât really red.